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Authenticator device disconnected and lost for Azure tenant

Christina Banavong 0 Reputation points
2026-03-21T15:24:06.3+00:00

I am the only Global Administrator for a Microsoft 365 tenant and lost access to my MFA authenticator app.

Only MFA available is the Microsoft Authenticator approval/code. I need the MFA registration reset.

I can't open a support ticket since I need to login and that requires a MFA

I have called 4 different support numbers and get hung up on after 20 minutes of talking to an automated machine

Microsoft Security | Microsoft Authenticator
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  1. Julie Huynh 750 Reputation points Independent Advisor
    2026-03-22T05:22:31.2666667+00:00

    Dear @Christina Banavong,

    Good day! Welcome to Microsoft Q&A forum!

    Based on your description, I understand that you’re the sole Global Administrator for your Microsoft 365 tenant and have lost access to your Microsoft Authenticator app, leaving you unable to complete MFA. Since the only available MFA method is Microsoft Authenticator approval or code, you’re unable to sign in to reset your MFA registration. You’ve also been unable to submit a support ticket because signing in requires MFA, and your attempts to contact support by phone have resulted in repeated disconnections after long waits.

    I sincerely apologize for the inconvenience caused by this issue.

    If you're the only admin, in this situation, the Microsoft Data Protection Team has tools and processes in place to verify identity and regain access to administrator accounts. 

    Please note that we have no control over user accounts, especially when it comes to logging in to your account, resetting your password, changing your access, etc. 

    Therefore, if you are the only administrator in your organization, then you need to involve Microsoft Data Protection Team. Please try to find the related hotline number to call the frontline let them raise a ticket for you: Customer service phone numbers - Microsoft Support (Scroll down for Business users)  User's image

    In some countries, this is an automated conversation: First, when you call the hotline, they will ask you what kind of problem you are struggling with. 

    Answer: Authenticator. 

    A: What products do you use? 

    B: Office 365 for business. 

    Verification: Education or company account? 

    B: For companies 

    A: Are you an administrator? 

    B: Yes. 

    A: Are there any other administrators in your organization? 

    B: No. 

    A: I need one.... Service request? 

    B: Yes 

    (Important Note: Sometimes, you would hear the computer-generated voice at first, please kindly wait for it to end, and if an agent is available, you would be directed to them and get your support. Depending on your country or region, when you call the support number, you may hear an introduction of about 30 seconds such as "You can visit the link...". You can ignore this introduction and wait until you are presented with the options. Then press "1" as a business email user, and again "1" for technical help.) 

    As an alternative, you can create a new tenant account and submit your request from there.    

    To set up a new tenant, please follow these steps: 

    Once your tenant is created, you should be able to access the support portal and submit your ticket referencing your locked account without further issues.

    In the ticket's description, you could refer to this message "Hello,

    I am currently locked out of my Microsoft 365 tenant because multi-factor authentication is enforced, and I am unable to complete the verification process. I am the only global administrator for this tenant, which means I cannot access my account or the Microsoft 365 Admin Center.

    To resolve this, I have created a new tenant and would like to be connected with the Data Protection Team to verify my identity and assist with regaining access. I am available to provide any required documentation or verification to support the recovery process."

    Ticket Support: Log in the Microsoft 365 Admin Center using the newly created trial admin account > Support > Help & Support. You can raise support ticket at: https://admin.microsoft.com/#/support/requests   

    • After clicking on "Help & Support" button like this image, you can type "I need agent support via phone or email". After that, you can click on "Contact support" 
    • Choose contact method: "Phone" 
    • Fill all the information in this contact support details, please describe your situation carefully so they will have enough information to help you. 
    • Finally, click on "Contact me" As an alternative, you can create a new tenant account and submit your request from there. 
    • Imagen del usuario
    • Imagen del usuario
    • Imagen del usuario
    • User's image
    • After completing them, you will receive an email appointment for a meeting to review this issue professionally together. 
    • For more details, you could refer to this article: Get support for Microsoft 365 for business 

    Please remember to cancel the trial subscription once your issue is resolved to avoid any unintended charges.

    Note: After creating the support ticket, please kindly let me know the ticket number so I could also track its process to help you regain access to your account/tenant.

    Kindly let me know when there are updates or if you need further assistance. Any updates you’re able to share would be really helpful.

    I'm here and happy to help! Thank you for your kindness and patience!


    If you have extra questions about this answer, please click "Comment". 

    Note: Please follow the steps in [our documentation] to enable e-mail notifications if you want to receive the related email notification for this thread. 

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